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EPPO AESSE
Species Aeschynomene sensitiva
Author Sw.
Family Fabaceae
Weed Type Broadleaf
Cotyledons Cotyledons are sessile. The lamina is reniform, base and apex rounded, smooth and glabrous.
First Leaves The first leaves are alternate, compound paripinnate.
General Habit Plant sub-woody annual or perennial erect to flexuous branches a little sticky measuring 1 to 2 m height, exceptionally up to 5 m.
Underground System Taproot present, Nodules present.
Stem The stem is usually dark purple. It is dotted with white spots in young stage and small warts overcome short hair when get older. The branches have a swollen base. They are glabrous or sparsely hairy.
Leaf The leaves are alternate, compound, paripinnate. They measure 2-10 cm long. The base is framed by 2 stipules appendiculate caducous, oval oblong narrow, 3-15 mm long and 1 to 2.5 mm wide, extended below the attachment point by an appendix of 1 to 4 mm long. The leave is composed of 5-23 pairs of leaflets, usually well opposite, oblong-linear, asymmetrical base, apex rounded to apiculate, measuring 4-15 mm long and 1-4 mm wide, univeined to raised vein below, glabrous.
Inflorescence The flowers are grouped by 2 to 10 axillary inflorescences of 2 to 10 cm long. The flower measures 7-8 mm long with a floral pedicel 2 to 5 mm. The calyx measures 3.5 to 4 mm long. It is glabrous, to entire lips. The corolla is yellow. The upper petal or standard measure 7-8 mm long. It is strongly streaked dark red on his lapel. The keel is curved, shorter than the standard, in yellow color.
Fruit The fruit is a pod articulated, straight or slightly curved, 3 to 5 cm long and 5 mm wide. It is composed of 7 to 10 items subrectangular measuring 3-5 mm long and 3-4 mm wide. Its surface is covered with a short pubescence variable intensity (loose to almost glabrous). Articles are nerves, smooth the edges, warty at the center. This pod is often purplish on one side.
Seed Seed kidney shaped measure 3-4 mm long and 2.5 to 3 mm wide. It is smooth, brown color.
Biology Annual to perennial species, reproduces from seeds.
Ecology Plant growing in marshes and marshy meadows.
Origin Native of Tropical America.
Local weediness Côte d'Ivoire: Rare and not abundant. Ghana: Frequent but not abundant. Mali: Rare but abondant when present Nigeria: Rare but abondant when present Senegal: Frequent but not abundant.
Global control Management options: http://www.afroweeds.org/network/pg/file/read/1902/general-guidelines-for-weed-management-in-lowland-rice
Reference Berhaut, J. 1976. Flore illustrée du Sénégal. Dicotylédones, tome 5, Légumineuses Papilionacées. Gouvernement du Sénégal, Ministère du Développement Rural et de l'Hydraulique, Direction des Eaux et Forêts, Dakar, Sénégal. Bosser, J., Fergusson, I.K., Soopramanien, C. Mult. an. Flore des Mascareignes. La Réunion, Maurice, Rodrigues. MSIRI, IRD, Kew. Fournet, J. 2002. Flore illustrée des phanérogames de Guadeloupe et de Martinique. Cirad, Gondwana éditions, Montpellier, France. Hutchinson, J., Dalziel, J.M., Keay, R.W.J., Hepper, F.N. 1958. Flora of west tropical africa. The Whitefriars Press, London & Tonbridge, Great Britain. Kissmann, K.G., Groth, D. 1992. Plantas Infestantes e Nocivas, Sao Paulo.
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